arm64: dts: ls1028a-rdb: enable emmc hs400 mode

This patch is to enable emmc hs400 mode for ls1028ardb.
Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
Acked-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/fsl-ls1028a-rdb.dts

@@ -93,6 +93,8 @@ &esdhc {
 
 &esdhc1 {
 	mmc-hs200-1_8v;
+	mmc-hs400-1_8v;
+	bus-width = <8>;
 	status = "okay";
 };